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Cryogenic Storage Tank Notes

Nov. 12, 2019

As a Cryogenic Storage Tank Manufacturer, share some information. Cryogenic storage tank: A pressure vessel is a closed device that holds a gas or a liquid and carries a certain pressure. The pressure of the low-pressure vessel is generally 0.1 MPa ≤ p < 1.6 MPa. So what is the smaller wall thickness of the low-pressure vessel? A smaller wall thickness refers to a smaller thickness specified by the pressure vessel to meet manufacturing, transportation, and installation requirements.

For micro internal pressure or low-pressure vessels, the corrosion allowance and negative deviation are considered in accordance with the internal pressure medium diameter formula and the wall thickness obtained by rounding is generally small.

Cryogenic Storage Tank

Cryogenic Storage Tank

Cryogenic Storage Tank: For low-pressure containers with small wall thickness, you need to pay attention to some things to prevent us from having more trouble and loss than necessary:

1. In the manufacturing process of thin-walled cylinders, in order to ensure roundness and rigidity, a large number of auxiliary measures are required, which consumes manpower and material resources. For example, it is necessary to use an inner reinforcing tool to round the barrel, especially at the butt edge of the two barrel sections.

2. The thin-walled cylinder wall, especially in the case of small cylinder diameter, is usually a single-sided welding double-sided forming welding method. However, single-sided welding of thin-walled containers is prone to defects such as incomplete penetration, burn-through, and poor back formation. Even if the back pad is added, the pad is not easily attached, and the root is prone to soldering defects. At the same time, the wrong side and angular deformation of the container cylinder group have a much greater influence on the quality of the thin-walled cylinder welding than the thick-walled cylinder.

3. Due to the poor rigidity of thin-walled containers, it is usually necessary to temporarily support or reinforce the cylinder during transportation and hoisting.

Cryogenic storage tanks: Crude oil is flammable. Crude oil leakage occurs frequently during storage and transportation. It mainly includes oil tank run oil, dewatering oil, equipment, pipelines, valve parts damaged oil, and poor sealing, resulting in oil and gas volatilization. All aspects of the design must be considered to prevent unnecessary problems in later use.

First, the design requirements for preventing the bottom of the floating plate

During normal operation, the floating plate on the floating roof tank can float freely as the oil level in the tank rises and falls. When the gravity on the floating plate is increased or the external force is stuck on the floating plate and cannot be freely moved, the floating plate is flooded due to the rapid oil collection, causing the bottom to sink.

Second, the central drain

Central drains play an important role in rapidly draining tank tops. It expands and contracts with the lifting and lowering of the floating plate, and it is prone to plastic deformation due to long-term tension or compression. Therefore, the quality level and technical standards should be appropriately improved during design to ensure flexibility and durability.

Third, anti-corrosion measures

The bottom of the crude oil storage tank always deposits a certain thickness of saltwater. When storing heavy oil or oil with high sulfur content and high acid value, the anti-corrosion requirement is higher. Although there is no uniform standard for anti-corrosion design of storage tanks in the country, it is self-evident that the system is designed and implemented with anti-corrosion for large crude oil storage tanks with large reserves and serious corrosiveness.

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